How to work with new windows

[ayaz-ashrapov]

Hi Joshua,
Thank you for your work. Could you, please, explain how to handle multiple windows and dialogs?
Here is my sample scenario:

1. Run application -> Login splash screen appears
2. Click to Login button -> splash screen disappears and main window shows up
3. Click to button in main window

I managed to write steps 1 and 2, but can't click any button at step 3 - test waits for some time then reports 'Unable to regex match on Screen' error. At that time application window is active and visible, so I wonder if there is some method that I need to call in order to redraw the whole screen before calling methods for controls in main window?